Steam's In-Home Streaming feature is now out of beta, allowing any users on Valve's PC distribution service to stream games between two computers on the same network.

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This means you can plop a high-end gaming PC in one room and let it handle all the heavy-duty work while you stream games to your laptop. Or, theoretically, you could get a cheap Steam Machine to run games on your TV while your bulky gaming PC sits in the office, doing its thing.